線性代數之線性獨立

2009-10-27 9:13 am
Determine whether the given vectors are linearly independent

(1)
[1]  [3]  [6]
[1] ,[2] ,[5]
[1]  [1]  [4]

(2)
[1]  [1]  [1]
[1] ,[2] ,[3]
[1]  [3]  [6]

判斷這些向量是否線性獨立?
如何判斷?

回答 (1)

2009-10-27 9:42 am
✔ 最佳答案
Both cases are 3 3-d vectors so the easiest way is to check determinant of the corresponding 3 by 3 matix. Since det A=0 in (1) , the 3 vectors are linearly dependent; det A=1(not 0) in (2) so the 3 vectors there are linearly independent.


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